Technical description and composition of the LG 47LB652V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 47LB652V ZA.BRUWLDU
Chassis / Version: LD42B
Panel: LC470DUH (FG) (P2) 6091L-2683D
LED driver (backlight): integrated into PSU; 117V 230mA (47 inch)
PWM LED driver: BL0202B
MOSFET LED driver: AP9561AGH
Power Supply (PSU): EAX65423801 (2.2) REV2.1 3PCR00367C
PWM Power: MAP8800 (PFC), FA6A01N (PWM Resonant), NR134S (PWM Step-down)
MOSFET Power: MMP60R580P, MMP60R360P, MBRF20100CTP, MDD7N25
MainBoard: EAX65384005 (1.2) EBU62521902
IC MainBoard: CPU: LG1311, EEPROM: AT24C256C-SSHL-T, SOUND: NTP7514
Tuner: TDJM-G101D
Control: WIFI: LGSBW41, IR: EBR78480603
Specifications 47LB652V
LG 47LB652V
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The LG 47LB652V TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
With such manifestations, a malfunction is most likely to be detected in the EAX65423801 power supply module. It is necessary to measure its secondary output voltages, and in case of their absence, check the operability of power switches (MMP60R580P, MMP60R360P, MBRF20100CTP, MDD7N25) of converters and rectifier diodes for the probability of avalanche breakdown (KZ).
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power key may be PWM (PWM) MAP8800 (PFC), FA6A01N (PWM Resonant), NR134S (PWM Step-down). It is checked only by replacement with a known good one.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the EAX65384005 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard - CPU: LG1311, EEPROM: AT24C256C-SSHL-T, SOUND: NTP7514. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the TDJM-G101D tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
It should be remembered! Attempts to self-repair the LG 47LB652V TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
firmware -----------> LG 47LB652V EEPROM 24C256.
schematic manual ---------------> LG CHASSIS LD42B MODEL: 47LB65** 47LB65**-Z*.
User Manual WiFi model -------------> LG Wi-Fi Module LGSBW41
PSU EAX65423801(2.1) - MAP8800, MMP60R580P x 2, FA6A01N, MMP60R360P x 2, NR134S (PWM Step-down), MBRF20100CTP x 2, BL0202B (Led Drive) , MMP60R580P, AP9561AGH x 2, MDD7N25
The appearance of the MainBoard EAX65384005 is shown in the figure below:EAX65384005
EAX65384005 can be used in TVs:
LG 42LB677V (Panel LC420DUH (PG) (F1)), LG 47LB652V ZA.BRUWLDU (Panel LC470DUH (FG) (P2) 6091L-2683D).
The appearance of the power supply
Main features of the device LG 47LB652V:
Installed matrix (LED-panel) LC470DUH (FG) (P2) 6091L-2683D.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the BL0202B PWM controller. As power elements of the LED driver, keys of the type AP9561AGH are used.
The necessary supply voltages for all nodes of the LG 47LB652V TV are generated by the EAX65423801 power supply module or its analogs using MAP8800 (PFC), FA6A01N (PWM Resonant), NR134S (PWM Step-down) microcircuits, and power switches of the MMP60R580P, MMP60R360725PN, MBMPRR6060, MBPFRFD, MBMPRF201, MBMPRFD, MDPFRRF60, MBPF, MDPFRRF60, MBMP .
MainBoard - the main board (motherboard) is an EAX65384005 module, using CPU chips: LG1311, EEPROM: AT24C256C-SSHL-T, SOUND: NTP7514 and others.
The TDJM-G101D tuner provides television reception and channel tuning.